Mining



Feb; 25, v1930. N. D.LEvlN R- 17,603

` MINING wucuurrf` riginal Filed Feb. 2s, 1910 4 s'ne'ets-sheet 2 PV 3,0m,

Re, luso?.v

Feb. 25, 1930.

N. n. LEVIN MINING MACHINE 4 sheets-sheet 3 Original Filed Feb. 25, 1910 i -sq l'III/111111111 a. @s 22 Illllw g INVENTOR WITNESS/55: l W @I 40%( 'A TTORNE Y Feb. 25. 1930. N,D, L EvlN Re. 172603 M .WN .QRS

LN. 4 em. 0

Y A am,

. Y, 1 w @Y A BNN scia? NNS Y .m5 VW m www@ 20 r machines which must he unloaded from a transporting truck prior to the cutting operi originaire. 1,247,419, dated Nevember 20,1917',

Reissued Feb. 25,v 1930,

AUrurrzn sv'TAr-asrrljaiNT l"OFFICE COMPANY, "conronArIoN 'or' oHro MINING l MACHINE The invention relates to lmachines' adapted to cut a kerf in the coal preparatory to blasting or otherwise breaking'the" coal from the solid. O'ne object of the invention is the provision of a ^machine comprising a wheel mounted base frame adapted to run uponand rbe'la'terally bracedby a track extending longitudinally toward a vertical coal face and Aa vcutter mechanism movably supported on the'base frame and adapted5'while sov supported, to be moved laterally to cut 'a horizontal kerf lextending transversely from vone sideof the track to the other.' Another object of theinvention is the provision of an apparatus such as referred to'adapted to move under its' own' power over the 4tracks of 'a mine from one working place to` another. and

to effect thercutting of the coalwhile stand ing upon the-track, thus obviating 'the seri'ous loss of time` and the labor incident to those.

ationand again 'loaded upon the truck 'after I- such operation. Other objects of the. inven- 'f 4the character referred to having its cutting -tio to the .base frameand provided with.1

. I tion relate to` the provlslon of amachine of mechanism mounted in a novel Way in relameanswhereby it can be adjusted, operated an'dcontroled in a novel :mannen The foree'c s, and others more or less incident thereto, will be understood from the follow:

' ing description and claims.

embodying my invention.

" I have shown in the accompanying draiv-` ings a machine embodying my invention: and

have illustrated the method to be followed in carrying out my invention,l but Ido not desire to be limited to the-construction shown as 'there are lmany changes. which' maylobvi ouslybe made.`

Referring to the drawings, Figure 1 is a side elevation ofthe machine Fig. 2 is a' plan view.

Fig 3 is a fragmentary. cross Vsectional' view taken along the linej3-3 of Fig. 2.

Fig 4 is a"fragmentary cross sectional' view taken along the line of Fig. 2.

' Fig. 5v is afragmentary crosssectional view along the line {if-*5 offFig. 2;

drivingmotor. these devices are connected withgthe motorl which iscarriedby and which drivesthe cute.

ting mechanism, a partei the train of devices serial ne. 545,337, fue February 23, 19,10. l Application 1919. seriar No, 314,641.

Fig.. 6 is -a lfragmentary cross sectional detail view of the driving. geara'djustment taken along the line 6-6 of Fig. l.

THE 1JEFFREY maivuracfrunme Fig. 7'is adetail View of one of the re-sV be operated.A In these views the machine is' v shown as cuttings room or any` entry.

. Figs. ,12 and vI3v are diagrammatic views showing other 'ways in which 'the machine can be'ope'iated. In these views the machine'is shown as, .cutting according to the longwall system. l

vFigs. 14 to 18` are diagrammatic views :showing Astill another way in which the machine can be operated. In these views the machine is shown as operating in another' way to cut a/room or entry.

The machine illustrated in the vdrawin s comprises a wheeledbase frame or truck a cutting mechanism B of the endless chain type and an intermediate frame C.. The cutting mechanism is su ported on the frame C so as to swing lateral y while cutting andthe' frame C- is itself vertically, and preferably angularly, adjustably supported on the truck,

vso that kerfs can be'cut vat various heights -and inclinations- Power means are provided for rotating the wheels of the truck and preferably the power means consists cfa ,train of power'transmitting 'devices adapted to be-*connected with a In. the construction shown being carriedv by the' cutting mechanism and a part directly bythe truck.V The two sets can be'cOnneCted when the cutting mechanism andthe motor are properlyadj usted with'respect to the truck. These parts will be again referred to belowanddescrihed in detail.

The truck A comprises the :rigid platform or'base lframe which is mounted upon thel 4, 4a." The Wheels are thus Vfixed relativelyto the base trame, although rotatable about` their axes. A step 5a is preferablyV provided. at the'rear end of thetruck.' Gis a cable reel,

which maybe of any usual or preferred con.` struction. Upon the reel 6 thereis wound a suitable 'electric' cable 7 adaptedvto have ts track wheels 3, Bf'rigidly' secured' to the axles conductors suitably'connecte'dat its free end with a suitable source ofcurrent supply',fsuch as the conductors in the lentry lot' a 'mine-- With this 'cable are made electrical connections to the motor to be hereinafter described.

1a .1 mittmg devices for rotating the .truck wheelsV which aremount'edon thetruck itselt` will 'nowj be described, -it being, of course, understoodtha'tas' concerns thedetailsY of -thes'e .de-i 2o -"Those of the above mentioned power transvices fthere'can bevamiation.'` To fone o the axles, as for instance 4%, there .is secured a driving gear '5.-'. Adjacent the, gear 5 and rotatably mountedV on the axle is .a bracket 8,

which -hastwo parallel arms 8'and18?. At theends of thearmsare provided hearings in `l`: .fwhi'ch are adapted to mesh with the worin 12).

The wor'm 12 isfsecu'red tothe rotatable shaft 13 which is mounted in suitable bearings and which extend'sto the rear end of the vtruk'and lcar-ries the handwheel 14. y

v'It will be noted 'that the power 4applied to the sprocket wheel 11"will be.v .transmitted through the shaft 9 andthe gears 10 and 5 to the. axle 4. The position `of thel sprocket f wheel 1-1 may be changed v witheut.afectin-gf gearing.lv This-`may be done by a rotation oflisoshaift 13, the worm 412and`the -worm segment llnto turn the bracket 8 about the axle. The'.

. ing or the sprocket wheel will -not movethe '-,bracket 8.

the loperation ,bf this power ltransmitting thc'hand wheel 14 which acts through-"the worm and' Awheel gearing makes the device self-locking,- as any force applied to the gearworm to permit a change oflposition of. the

' The devices for to the .intermediate frame @vertical studs or uprights which are 'mounted on the. truck frame andarranged tcden'e a polygon in horizontalipl'an. AvThe studs are iixedly'held in-their upright pt zisitions. As shown there are three studsl5,'15, 15 arranged to define an equilateral triangle. Preferably one of these which are provided with radial apertures for comprises 'a circularjring" 18 -zpreferably reccated a `nut16.' The `apertures 'in the yoke 21 4are suiic'iently llarge to permita certain is mountedinthelcenter of the machine at the frontend, the others being symmetrically located near the 'rear end;l Each of the studs is threaded and is providedwith two nntsjl and 17, whichL have beveledv surfaces and l.m

the insertionv ci a bar -or Spanner wrench for The intermediate frame C as hereshown tangularin cross vsection,'assh'ow-n 1n Fig. 3; Equally spacedab'outthi's 'ring are `three der `pending brackets 19which`comprise two par-.. 1 l

allel side bars 2Q, 2() and. a' horizontal yoke 21 at the bottom ofthe said .bars and having 80 an aperture adapted to receive one of the studsi. -jf

O n each stud below the yoke21fijs located a. nut 17.. Oneach studaboye theyokeis loamount of lateral movement et' .the yokes relv -ati've tothe studs. It will'be .seen .that by a proper adjustment of thenuts^17 the' brackets 19 with the ring`1'8 may 'be' raised orlowered au o r adjustedy to any desired anglel'relative to f the truck. The nuts l16 serve as lock'nu't's to hold'jthe brackets in vtheir adjusted positions `andjto friction'ally lock the nuts-17 lby pressure transmitted thoughjtheyoke 21."

' When the parts are 'assembledas described l.the rigidiframe G serves to1ti'es'the vertical supporting studs 15 together softhat' they'v `mutually. brace each .otl1er;.jThi s' actionkof :the frame Gis especially. advantageousiwhenloo Lit isadjusted well toward the Itop ofthestnds .f as it insures a strong, rigidirame structure.

Asconcerns the cuttingl mechanism B it is lessential that it bexmovably mounted rela-A, tively tothe base frame so `that itca -n 4eut. a "las lhoriZoaitally ektencling-kerf across the vfront of the truck; In the construction illustrated.

fthe cutting mechanism isimov'able horizon-f l tally with respect to the intermediate ofi su'p.; ,porting frame C. and 'comprises a rotatable? 110 table or rameQQaupon which the variousop; erative parts are supported. This frame rests directly .en the top ofthe ring 18fand is adapted to rtate relative thereto. A series" oiA rollers 23 are rotatably mountedl onthe 1115 .under sidelof thev frame 22?` and are adapted; to engage vthe inner 'surface of theY ringto guide the frame 22% in its rotation. 'I A series of brackets or' clips 24 are providedwhich'are attached to the underside of the' frame 22t 120- and engage the under 'side ofthe ring 18 to' supporting and vadjusting 1 thecutting mechanism comprise, Ain additionv prevent the frame from movingupward relative to the ring.

As will befully explained below, the cutting mechanism can lbe 'used' either' when 125 movingrelatively to the truck or when it is locked thereto -and fthe whole .machine is. moved bodily:y In' vorder that the cutting mechanismmay be locked in various angular vpositions to the intermediate frame, the outer edgeof therframe'22" 'isprovided-with..El`

. seriesof notches `to the ring'18 and in this bearingthere is lstruction and tive mechanism 'there can` be modication,

25. A bearing 2 6 is secured slidably mounted a' latch 27 which, iiifits upper position, will engage-one of the notches and thus prevent the table 22a from turning. When the latch is'in its lower position, itis disengagedv from the framenotches 25 and the table is left free to turn. The latch may be held in either position by means of va 'pin 28, which'may be inserted in either of the holes29 and'30.

Electric power is provided for operating thejmachine, that is, for driving the cutters, for moving the cutting mechanism relatively to the truck or for moving the entire machine bodily (as will be morelfull'y explained below) and for rotating the truck lwheels to transport the machine. As concerns the conarrangement of the electric mobut as shown'there -is an electric motor 31 carriedxbythe'truck and bodily movable there-v r with. vPreferably itis suspended from theV table 22. Blf is a controller for the motor and .is referably mounted on the motor frame. uitable electrical connections :are

` provided -for the controller and motor. AAs

shown, the connections comprise a cable 72L ex# tending from the cable reel 6 to the controller 3l, and a cable 7 b :extending from the controller to the motorfsaid cables having con! -of conductors, fuses, switches, etc., which is ductors suitably connected at :their respective ends tothe terminals of the cable reel, controller' and, motor toform an 'operative electrical `connection between the conductors of cable^7 and the motor-31. I have not shown these electrical. connections,- in detail because 'any of the well known arrangements suitable for the purpose indi'cated,`can be used, The motor is provided with the shaft 32 carrying the driving pinion' 33. The pinf ion 33 meshes with the gear 34 which is rotat- Y 4to and projects .nected a vsprocket with the sleeve 36 and the sprocket vwheel 37, is rotatable cured to'it may be moved readily inward or outward in `the slots 39 to engage or disengage the notches .ably mounted on the shaft S5. As shown'vin 34 is 'connected to a quill o`r which is con- T-he gear 34,

Fig. 5 thegear sleeve 36, to the outer end of wheel ,37.

on the shaft and may be se-l by means of the pinsSS which 40 in the flange 41 which' is connected to the 'Shaftaa e Referring now to the Acutterdevices, 46 is an endless cutter-carrying chain suitablyrsupported and guided for movement around the periphery of a relatively narrow, elongated cutter arm 47 which is rigidly secured horizontally frorn# the frame or table 2 2, preferably inan elevated position, as shown,fthe table 22? andarm 47 thus constitutinga laterally movable cutterframe. For driving the chain 46 there is provided the 4 fra-ine 22.*.'

`of the clutch meohanism'l..

a sprocket wheelj mounted at the upper' end l,of a vertical shaft42fwhich is mountedin a suitable bearing on the frame 22. This shaft is located directly above 4the shaft 35,

butbth' shafts are`preferably located at one side of the center of the frame22.` The shaft 42jis provided' at itsv lower end with a bevel gear-43twhich meshes with a bevel pinion 44 on the .shaft 35. f

As concerns vthe power actuated mechanism-for moving the cutting mechanism relatively to the base o rgtruck frame and' vfor moving the entire machine bodily, there can be variation, bu'tfI-preferjthev mechanism shown,.. which comprises asutab1e cable adapted to .be wound upon a 'drum'which is.

driven by the aforesaid motor'l.

48 represents as a whole the winding drum.

49 is a vertical shaft'for the drum and is ro,

tatably mounted infasuitable .bearing on 50 '-'represents the drum is `mounted to'b'e capable o proper which rotation independentlyof the shaft 49, biut which may'be connectedthereto by means Af cable 55 islconnected to drum 50 and is adapted tobe wound uponvit. The

cable passes from the drum. 50 overtaseries ofsheaves 6l, 6 0, 59, 58, 57 and 56. After passing over-the last guide sheave the cable.

can .have its` end suitably secured at .any desired point outside .of the machine vso as to move the machine bodilyi when the'fc'utting mechanism'is locked against relative'movement. Such an arrangement is shown'in Figs'. 13, 14, 17 and 18. lf it'is desiredto swing the cutting mechanism relative to` the truck frame.

the brackets 19, such an arrangement being exemplified in Figs. 10, 11,12, 15 and 16.

'These ig'uresyand also Figs. 13, 14, 17 andv This 'clutch' the end of the cable may bev vsecured to one of the cable holders 62 which are attached to the` ring' 18, preferably abovey lll) 18, will hereinafter be explained more' fully.

Ilia-ve described thecable 55 as passing over all. of the sheaves. 'It will be understoodj' however` that this is not necessary and de.

pends `entirely on the position ofthe table relative to'the. point of attachment'of the cable; It will be noted that' the sheaves 56y and 61 are' larger' than the 0thers,vth c reason for this being that .the cable must be 'turned' through a greater angle-inl passing 'over these sheaves.

At thelower end Tof the shaft 49 is a worin fao ` Wheel Whichmeshes with a Worm 64 mounted on the shaft 65. The shaft 6a is parallel to the shaft and is rotatable nin suitable A ball thrust bearing' 66 is preferably provided to take theI lbearings on the frame 22a.'

` end thrust of the shaft'idue to the reaaction way betweenits Vbearings and on the center yline ofthe machine. On. each side ofi the ratchet Wheel 67 is' located a bracket 68 Which is rotatable about the' shaft 65; Between `the twobraekets 68r there is mounted a paWl 69 Whichis'adapted to engage the ratchet 'Wheel 67. The spring-70 engages at one end with the'pawl andat the other end with. a pinv 71A whichre'xtends between the bracletsjGS, This spring tends to' holdthepafivl 69in 0p-.

erative engagement.' with'the ratchet ivheel67.

'20 An eccentric 42 is mounted onthe shaft" 42 and carries a strap 42h." l' Fhestrap 4 2? is4 connected by means ,of a horizontal pivot 42" may-engageY the ratchet Wheel 67 to inter-A `1 inittentliy` rotate it. -Th'e horizontal pivotsy 42C and68d permitthe vertical Vmovement ot' the rod 68al Whichi's incidental to theA swinging of thexarm 68. Thev vertical piYot 689 permits Vthe rod 681L tofmovelaterally with theeccentric 'strap 42". 'On each side ofthe ratchet Wheeli67 and Apreterabty outside of I the brackets68 'are two arms'72, each rotatablyA lmounted' at one end of thef shaft 65. rEhe 'outer ends of these armsfare connected .by a-pivotalljz mounted yoke73, Whichvhas t the nuts 16 and 1 7 onthe studs 15. The shaft a threadedaperture through which passes the threaded adjusting rod174 Hand Wheels 75 and 76 are provided at the upper and lower ends of thisr'o d. V Therod passes loosely through a suitable aperture in the frame 22a andcollars 77 are securedtothe rod ateach 1 side` of .the frame and serve to prevent move-` Y `menti of the'rod ythrough the aperture. Ain` arcuate linger-,73m rigidlyattached tothe arms 72 and is concentric with the'shaft 65 and the ratchet Wheel 67. The finger 'Z8-is ofsuchlength vthat it may be' adjusted to.

engage the pawl 69V and hold it outgof engagement With the ratchet Wheel during a part of its movement.

j The sprocket 4Wheel 37 is located' at such a distance from the center oftfthe machine that it 'will be in alinement with the sprocket Wheelll When the table 22a is in position, i, as shown inv thef drawings, -With the 'cutter' fra1ne`47 parallel to the track. `When the i parts are in this position7 a chain 79V maybe l motor and the truck wheels.- lof theworm 64 and the Awheel V63. 67 is ratchet Wheel mounted onthe shaft' 65 midtable 22fris'swung to theposition-sho'wnin thedraWing-s and the chain 79-is put in placeV i -tionmay vbe accommodated to any vertical l :position of the sprocket Wheel 37. This adnected to the 'connecting rod by 1`rneansof a Ajusting mechanism also furnishes a means VrticalpvotGSC. and to'the varms 68 by means. of a Ahorizontal pivot 68d. By'mea'ns of-this construction the-arms 68. arejrockedbacl- Wa-rd and forward'abouttheyshaft asthe :eccentric is rotated, ytl1e`paWl 69 being thus".

given a reciprocatbry movementjwhereby it' l fromfthe motor bymoving'the pins` 3 8 out pins 38 .and power is thus transmittedfrom1 the fecdd'ruin 50 and the various sheavesin` 'the-manner `which has been previously d e` ,which may be thrown into vengagement byV passed over the sprocket 1Wheels 37 and Vll and eccentric 42a. The Worm and' 'Wheel may-serve to transmitpower from the motor d 31 to thedriving Wheels of the truck.

The sprocket l Wheel 37 and the chain.- 79- serve to complete the before-mentioned train of lpower 'transmittingVdevicesbetween the` 70.

The operation of the machine s-as follows XVhen'it is desiredto move the machine from placeto place Vabout a mine' or 'elsewhere the on, the sprockets and 11.! In order that but. one length of chain need'be provided forva'i'ious Vertical adjustments ofthe ma` chine, the mechanism shown in Figs. v1 and gg .has been 1:roVided .-'V As has ybeen preyious1ydescribed, vthe sprocket wheel 11 ma be swung about theaXle 4 byrotation o vthe han-d Wheel 14:, it. swings about the axle itsdifstanc'eifrem the sprocket wheel 37 is changed, and bya proper adjustment its posif for tensioning th'clkchan T9-'and `makes it pos- V sible for the chain to be eadily-placed' on. Vthe-sprocket Wheels and afterward-tightened.

When the-machine is toJoe dritfenby means of this mechanism, the shaft35 is disengaged of the notches 40 in the flange tlf and lock ing them at theouter Iends of the -slotsf39; 'PoWer'is the-n transmitted' from the niotor through the gears- 33 and 34 andthe sleeve 3 6 tothesprocket Wheel 37l and from this sprocketA Wheel to the ,axlelta and the Wheels;

.Shymeansfof the mechanism which has been 't i previously. described. l

4When the machineisjin position for mak'- 35 lis. connected to the motor by means of the Y the motor' through the gears 33 and 34, to the shaft 35,'thegears 43 and 44: to the shaft 1lQjand the sprocket Wheel 45 which drives the cutter chain 4 6. f

The feed cable isplacedin positiononf scribed; The .end ofthe cable mayzbef-fasf tent-:dtoI one of the cable -holders 62 or it may be anchored in a 'convenient manner 'at a point external to the machine, .according to the mannerlin `which the machine is tobe used. By means of' the friction Iclutch 5l the hand Wheel 54, theV drum 50A'is connected the shaft 49. This shaft is intermittently rotated through the wheel'63`, the Worm 64, the shaft 65 and the ratchet Wheel 67 bjf means ofthe paWl 69 which is operated by f als.

mechanism acts as a self-locking device`r to prevent the' reverselnovement ofthe drum when the ,pawlis moving backward on the ratchet Wheel.- As the drum is rotated, the cable 55 is 'wound upon' it andthe table 22- is slowly rotated upon its supporting frame, the moving cutter chain being vthus 'forced l, through the coal: The operation of the machinev is not-confined' to a rotationjof -the -table and cutting'mechani'sm relative to the supporting 'f1-ame.' The table 22* may be. locked by-means of the latclr27 in any desired position, asv for instance with the cutl- I ter frame 47 at right angles tothe track, as

in Fig.- 13,- or at an inclination to the' track,

i as in'Figs. 14, 17 and 18. With the parts in" such a position, the cable 55'may be attached to a pointeXternal to the'machi'ne and the whole .machine drawn along the track, the cutter chain being forced through the coal by rdneans ofthe winding of the cableo'n the .n will 13e-noted that he friction durch 5i,

by means of which -the Ydrum is connected to its rotating mechanism, furnishes a safety device adapted to prevent too rapidV feeding of the cutting mechanismthrough the coal.- The friction clutch 'may beset by means of the hand Wheel |54 toyield at a desired resistance, land in'this way it is'impossible for force beyond a certain predetermined amount. to be transmitted to the cutters.`

' The rate of feed may .be adjusted by means of either of the handjwh'eels and?? 6 which control the finger 7 8. As has been previously stated, the fmger 78 isadapted to`engagethe` pawl 69 during the first pant of its operative pawl 69 t'ofhold it out of engagement with `the ratchet wheel 67 duringv a part of'its movement., The finger 7 8 may be swung vso far backward as toinot. interfere at all with the pawl 69, in which case the pawl at each reciprocation would-rotate the ratchet lwheel 67 through an anglecorresponding-to say six notches. When the linger 78 is swung' forward a certain amount itw-ill engage the preferable to out -thekcrf at orrnear the top of the seam, orvat'some point between thetop and the bottom., This is especially the-case in mines where there are present in the coal seam' bands or layers of impurities which must not be mixed with the coal. These layers are, of course, at different heights in dif-1 4 'ferent mines, and even vary markedly` in .height romplace'to `place in the same mine,` In fact, even in a Aiven room the layer -or hand of dirt may be inclined so as to be much higher atene side'than at the other. lWhen such dirt bands are encountered, a 'machine embodying my invention canbe .used to'cut them out; 'that is, the icutting mechanism is adjusted vertically, and angularly, ifnecessary, so that' it will follow the dirt b'and and remove it, thus performing the double function'of gettingrid of the dirt and forming a' kerf to permit shooting of the coal. y

In order'that the mannerof ntilizin my invention and my'me'thod of forming erfs may be clearly'` understood, I have indicated in the diagrammatic Figs. 10 to18-' -o'f the drawings severalof the ways in which my@ machine 'can-be used, and these I 'Will'jnow lgrieiy described: '.peferring. first to' "beobserved that the machine is here shown as operating on a track which extends along rigs; 1o .and 11,- it win".

the center of 'droom tothe face which is to be f cut.' From the mine entry the machine advances under its own power intoV the room and is brought toa position as close as convenient tothe face of tlie coal. The cutting mechanism having been extended toward the right, as shown .in Fig. 10, thecable 55 isv passed' around the several sheaves and secured toy one of theholders62 as shown. The

cutting-mechanism is then set in motion and .thencable is wound so vas to swing the-cutv-ting mechanlsm from right to left to cause itl to cut a semicircularfkerf extending from one side of the room` to thexothen `In Fig.' 11

the kerf is shown half cut and the dotted lines indicate the position of the cutter after the completion of the out...`A

It will be understood that the cutter mechanism can be adjustedas desired either vertically or angularly at the beginning of the cutjtingfor at any timeA during .its progress, to follow inclinations and irregularities in the -dirt band which is being out, or to edect such variations in the kerf as may bedesired for other reasons. A

Ordinarily, as soon as the kerf has been completed, -the machine is Amoved from the room under its own power, in the manner previously described, and thence through the mine ventry to another room where the operation is repeated. Thus, duringa working period or shift, a considerable number of room faces will be cut preparatory to the breaking down Vof the coal.

In Fig. 12 the machine is shown working on -atrack parallel with the coal face to be cut. In starting the Aoperatien-the feed cable is passed around several of the sheaves and connected to one of the holders 62.' Then the cutters and the -winding drum are set in motion causingthe cutter bar to swing from right to left, or counter-clockwise, .from the .position shown indotted lines, to that shown 'infull lines. When this full line position isi,

vit

reached the feedis stopped and the cable -is loosened, taken off from theV holder '62; and' extended along theuface to a suitable 'jack -80 in the manner'indicated in Fig. 13. The

'cutting mechanism is `then locked against lswirlglng and'thetwinding drum again start. I ed. The` draft of the' cable now serves 'to draw ,theA entire machine along Jthe track, the

cutters meantime lforming the hert.V In Fig. 13 the operation'v issirnilar to that describedin connection-with Fig. 12, the for- "finer figure'be'ing designed to show the man.-

dotted Alinesindicate the positionof the maner -inwhich the machir'iecanbe used'to start," a kerf adjacent a si'dc wall or rib. The

chineafter the clntter' has been swung under the coal and the cablecarriedsalong the `face Y Uto ajaclr.: Theifullzlines indicate theposi- .worked in the Ways indicated in Figs. '12 and .tically and an tion of the machine lafter the cutting opera` tion has progressed some distance.' It will be understood that `when the machine s 13., the'cutter'mechanism can be adjusted vergularly in the manlnerrpreyious; ly described'l a Referring to the operation as shown in Figs. 14C to 18, it will be observedlthathere again,'i n practicing the methodhere contemplated and illustratedthe machine isV shown Y as `operating on a track which extends along` the center ofar'rooin. In "starting'theV cut the y cutter arm is'positioned as shown in. Fig. 14

,and is located'in place relatively to thetru'clr.` The cable is'n carried from the drum' 50 Vover some ofthe guide sheaves and extended then started, and by means of 'thecable'y the `entire machine is drawn orwardto'the po.

orjwardtoi ai suitable anchor or jack, as indicated. at 81. The' cuttingA mechanism is sition indicated in Fig. 15. vThen 'thefcuttng mechanism is vunlocked so `as to'- be" free to 'swing and the 'cable 55 is ,carriedl around the t t to a suitable anchor at 82. The cutting mechsheaves vand secured' to oneof the holders 62,

as indicated in Fig. 15. 1Windii'ig of the cable is then resumed and the cutting mechanismv is forced to swingtoward thezleftthrough the position indicated in Fig. 16 andY to` the position indicated inFig; 17;;"1-"hen the windingof the cable lis stoppedythe cable is' removed from the holder {i2-and is carried back anism lis locked in'position on theV truck and the'cable iswound to draw the entire ymachine back to the position. indicated in Fig.

, 18, ythe cut'being then complete.

methods of'operating the-machine indicated It will bennderstood, of course, that the in Figs. 10and 11/and 14 to 18,are applicable 4 to the driving of entries' as Well as'to ro'om Y and pillar cutting which has beenreferred'to in the oregoing'description.

From. the `foreoinodescription it will be seen that the maciinenis adaptedfor the cutting of ay lkerf vwhich vextends acrossy one yend ofthe machine roma longitudinal vertical plane atene side of the'track to a longitudinal vertical plane at 'the other side of thev track,- and, furthermore, thatfit is well adapt- 'ed for thecutting of a ker having two end wallsparallel to-each other andto the centralA track and .having 'a V'third connecting wall which extends transversely across the central vertical plane of the machine romone tothe other of theftwo'end walls. For the cutting of'a herd' such aslast referred to, I" prefer a construction such' as illustrated in Which-.the .cutter apparatusis mountedon' the base frame to swing about a relativelyixed axis, but it lwill be understood wthat sol lapparatus'can loe-used.

v*In room and' pillar work my improved Ways of mount-ing 4and `guiding the cutterI far as many of the-features of my invention .are concerned, this 1s not essentiahand'other machine, particularlyfwhen it'fis used in the `ways ahove described tov form the hert across Athe face-by a swinging or arcuate cut,has a Workingncapacity greatly eXceedingthat-of any prior kerf'cutting machine known to me. -I attribute, this largely increased working capacity to l the `fact that the machineV is adapted to forinakerfV fromside to-.side of theroom while'it, as an entirety, stands on the track over which it approachesand leaves the working face, together with the fact that Vthe power mechanism of the machine, in' con- '-nection with the electric cable and reel devices, affords meansadapted to drive the track Wheels to transport the machine Vover theminewtracks from room to room. AUnder its own power the machine movesj over the V,naine tracks at an ample speed andwhen the sum'ed, as in the case of other.types of` ma-' face of the coal isl reached, no time is con'- lles jchines, in unloadin'gthe cutting mechanism i and inV reloading itaft-er thekerf has been cut: In this connection it is Vto he noted also V.that while there canI :be considerable variation in the cutter 'mechanism properin so ar as some features of my invention Vare'con- Cerned, itv is essential, when the machine'V is y to be operated in the manner last referred to above, that a cutter mechanism, substantially such as I 'haye 'shown and described, vne provided. In order to attain a working 4capacity such as isattained, it is necessary that the machine loe capable of cutting by` the swinging movement of-thefcutterd a face of considerable length measured from pillar to pillar, v In other words, the' cutter'mechau frame o r truck, and this means extremely ,se-`

vverestresses which must be provided for in the construction of the cutter mechanism and in the .mount ing of the sameV upon the base traine. By the nse of endless chain cutters mounted ona narrow elongated cutter arm having "a widely extended lbearing support directly above the wheel base of the machine,

.nism must haveva Wide reach beyond the base -I find it possible to attain a radial reach for thek cutters which would be quite impossible With other forms' of cutter mechanism,fetich,` forexample, as disk or Wheel cutters which are limited iii practice to relatively smallI diameters, and rotary bar cutters in which the entire force of the-reaction of the coal onl A the cutters must be transmitted through the bearing' inlwhich the bar is rotatably supported atits eXtreme end. Also, in my im-1 -proved machine, itis important that the'- frame Structure rofpwhich the aforesaid wide bearing. -support is a jpart should have a correspondingly Wide ground .support and that itibe su'iiciently rigid to transmit the severe Working stresses to' the track rails .With-l out being materially strained or Iracked. This lrequirement can be met with different "forms of frame structure but, when thecut tei-frame is to be vertically adjusted through a relatively Wide range, vI prefer avstructuire of the characterj shown having a rigid base disposed relatively close tothe ground and carrying upwardly extendingA supports --for the cutting mechanism. V

In the lconstruction shown and described the upright supports l5 are rigidly and fixedly mounted on'fthe truck frame and the lcutting apparatusis both'vertically adjustable andlaterally movabletin relation to said supports; but my invention, in its broader aspects, is not to be understoodV as limited to su'eli a relation ofthe pai ts, for it is obvious that provision for the lateral swinging move.- ment of cutting apparatus vertically adjustably mounted on upright supports, can be' made inother vvays. Obviously, the vertical adjustment on the upright supports can be effected by other means than screw threads and nuts, I though that is the means which I prefer.

I' have shown the cutter mechanism as located near the uppermost plane of the inachine, and this isv the preferred construction, as it is there vthat the dirt bands referredto are most frequently found; but it. .Willbe understood that the invention is not limited in this respect, and may be modied to meet the conditions for Which it is intended to be used. Another reason Why the location of the cutti'ngmechanisml shown is the preferred one is that in inany'cases it is rfound preferable to cut .the kerf near the roof instead of near the floor, and to shoot the coal up inu stead of down, as Wascustomary prior to my invention. Ithas vbeen found thatwhen the coal'isshot up it is vleft in larger pieces and therefore' is more suitable for'usc; and it has, furthermore, been found that there is less tendency to shatter the roof When-the coal isshot up than When it is shot dov/vn.A

The motor is. preferably mounted', as.

shown, to be movable with the'cutting apparatus, but it Will be understood that as 'to eos and the depth of the'cut. Furthermore', the

rate-of feed is adjustable While the cutting inechanismis in operation, this being especially important in a machine of .this class in 'Which, during a swinging semicircular cut, as indicatedin Figs. '10 and 1 1 the cut is relaand relatively deep Aat the center. Il have vprovidedmeans whereby the rate of feed can l bem-ade relatively rapid at the ends of the fout and relatively slow at the center Without stopping the action ofthe cutting mechanism. The provision of a rope for effecting the feed- .ing isadv-antageous,l as it enables the connection to the base frame to be made quickly and conveniently at any one-of` several points;

and as it, furthermore, makespossible the use l of-the saine feeding mechanism veither for turning the cutter arm `oiitlie base frame or for mov'fingthe Whole machine bodily along the track.v n l I do not herein claim as a part of my preisent invention' a Wheel` supported base frame -or truck,` cutting apparatus movably mounted thereon, a rotatable reel and a cable thereon'for supplying electric current to the machine, as such subject-matter is presented in .my copending application for mining machines and trucks, Serial No. 579,798, filed 'August 31, 1910, upon which Patent No. Lll'BT Was granted April 27, 1915.

I do not herein specifically claim a mining machine having cutting apparatus adaptl ledto form a kerf in relatively high horizontal' planes and a kerf in relatively loW horizontal planes arranged soltliat said cutting apparatus cannot form horizontalcuts in the coal between'the'first aforesaid horizontal planes andthe second aforesaid horizontal plaiies;'tliat is toI say, I donot specifically claim cutting apparatus combined with and supported on a horizontally mounted vertically rotating carrier adapted to 'swing vertically 'around the axis of the said carrier to form `a horizontal kerf in relatively higher horizont-al planes and then swing the axis of said carrier to a position which vcan form a horizontal ,kerf in relatively loWer. horizontal planes.

lVhat I claim is:

l. In a. mining machine, the combination of 'a Wheel-supported i'igidbase frame adapt-- ed to run upon and be'braced by the rails tively'shallow at the beginning and at the end' ofa mine track, a laterallyv lmovable 'endless l chain` cutter apparatuslbarried byf-the basefranieandproj ecting horizontally therefrom,

supporting means between the cutter apparatus and' the base frame comprising a plurality i-of upright supports'extending` upward from i, ythe base frame and lield in uprightposii f 'tions at the angles ofa relatively'widelyex- Vtended horizontal polygon and connections between each'ofthe upright supports and the cutterapparatiis for sustaining said apparattus andadj Listing it vertically in relation to ,Y the base. frame, and driving connections# whereby thepower cat said-motor devicesv is caused to drive the cutter apparatus and move it laterally, therebyg'forming an elongated Y horizontally extended lerf.'

2L ina mining machine, the combination :Y of a wheeljsupported rigid base frame adaptmine track, a-plurality'of 'uprightsupports ed to run upon and be braced by the rails of a' imounted directly on the base framea'nd exi of a relatively widely` extended horizontal y tending upward .therefrom at the '-:angle's polygon, a rigid cutter L! frame comprising a widely expandedturn table and anelongated cutter arml projecting laterally from said.

. table Vand froni'the base. frame, means carried by and vertically adjustable on the upright 'supports forming a bearing support for the turntable, an endless c utter chain mounted on l theciitter arni,motor devicescarijied by the f base frame, 'and driving connections whereby the power ofsaid motor devices `iscausedto drive the cutter chain and to move the ,arm` -laterally, thereby forming an elongated hoi-i Izontally extended lrerf, 4

3. In a coal cutting macliine,.the combinaj` i tion. of a wheel-supported rigidbaseframe, 40

three upright threaded studs mounted on the base frame at the angles of ahorizontal trif angle, a'cutter mechanism, a supportingframe upon which the said mechanismfis rotatably the studs are adapted to pass. nuts on the studs and adapted to engage the brackets, a coal cutting mechanism and a supporting tasupported-and nuts on the upright studs. foi` i sustaining and vertically adjusting the supporting' vframe and cutter mechanism.

4.- In a coal cutting machine, the combi-` nation with a inovablebase, of three equi'distantly disposed vertical threaded studs, asupporting frame comprising three brackets with i aperturesl which the studs are adapted to en ter, nuts adiustable on the studs and adapted to engage the brackets, a coal cutting meth-` anism and `a supporting table "for the said coal cutting mechanism rotatably mounted upon the supporting frame, substantially as setffort-h. 4

5. in a coal cutting machine, the combination with a movable base, yof three equidistaiitly arranged vertical threaded studs, at supporting ring, brackets connected to the ring and having apertures through which bleffor the coal cutting anechanismfsupported bythe -said ring and mounted to rotate relatively thereto, substantially as set forth.

6. In acoal cutting machine, the combi-vA nation with a movablebase, of a horizontal supporting ringmouiited o n the-base, means for adjusting the' ring vertically and angue v larly with respect to the base,`a coal cutting mechanism, a supporting table for the coal vcutting mechanism arranged to Arest diiectiy upon the upper surface ofthe ring to 'be rotatably'supported thereby, and a plurality of devices secured to the supporting table at points within-the outline of the rin-g to engage the inner surface `ofv the ring f and prevent* horizontal,v movement of the table with re-r spect thereto, substantially as set 'fort/h. 7. In avcoa-l cutting mechanism, `the coml bination withia movable lbase, of a horizontal supporting ring mounted on thebase, means foradjusting the ring vertically and angu` larly with .respect to the base, a coal cutting mechanism, a supporting table lfoijthe coal cutting' mechanism arranged to rest directly i upon-theupper surface ofthe ring to 'be ro vj c `.tatablyl supported thereby, a plurality of de'- vices secured to the supporting tablelat Vpoints within the outline of the ring to. engagethe 'e inner surface ofthe ring and prevent horif. v

zontal movem'ent'of theptable with respect thereto, vand a plurality of clips connectedvv to the table and provided with parts 'posi-- tioned to engage thelower surface 4df lthe ring4 to prevent; upward movement of the table with respect lto the'ring, substantially 'as set" fort-hf y ,-8. In a coal cutting machine, the` combi* vnation with a movableV base, of a horizontal supporting ring mounted vonthe 'base'and4 normally ixed against movement with respect thereto, a4 coal cutting mechanism, a supporting table forvthe co'al cutting mechanism arranged to rest directly upon the upper surface of the .ring to be rotatably. sup#l ported thereby, the said table having a*A cir' cular notched peripheryprojecting outward beyond the outer edges ofthe ring, a plurality of devices secured to the'supporting 'table at points within the outlineof the ring to.

engage the inner surface ofthe ring and preventhorizontal movement ofthe table with respect-thereto, allatch mounted on the outside of thering'toniove vertically yinto or y outv of engagement with one of. thenotches,

ofthe table to'lock thev table against movenient,',and means. for securing the latch in" either its upper operative position or its lower L vinoperative, position', substantially as set 9. ln a coal cutting machine, the combination with a base, of a laterally'eiitending coal cuttingl mechanismA comprising a table iro tatable relatively to the base', aovind ing drum mounted upon the table.,` a cable adapted toA be wound upon the drum andjto'be attached i at its other end to a pointcxternal to the tamechanism comprising a friction lclutch be-A ble, `a power device, and power transmitting tween the power device and the drum wherebythe drum may be rotated to wind the cable and thereby rotate the table relatively to the base, substantiallyV as set forth.

10. In a coal cutting machine, the combination with a base, of a coal cutting mechanism extending laterally `from the base and comprising a table rotatable relatively to the base, a winding drum mounted upon the table,` a cable adapted to be wound upon the drum' and adapted to be'attached at its other end to a'pointexternal to the table, a power device, transmitting mechanism -comprising a friction clutch between the power device and the drum whereby the druin may berotated to wind the cabli and thereby rotate the table relative to the base, and means for adjusting the power transmittingA capacity of the friction clutch, substantiall'y as set forth.

11. In a coal cutting machine, the combination with a movable base, of Aa coal outting mechanism extending laterally from the base and comprising a table rotatable relatively to the base, a winding drum on I the table, a plurality of sheaves mounted on vertical axes and arranged circumferentially about the table, a cable adapted to be wound upon the drum, to pass over the sheaves and to be connected at its other end to a point external to the table, and means for rotating the drum to wind the cable andl thereby rotate the table, substantially as set forth.

12. In a coal cutting machine, the combination of a linearly movable base, a cutter frame mounted on the base for movement about a vertical axis and having an elongated cutter arm extendingv horizontally from the base in planes near the top of the frame, an

, endless cutterchain on the arm, a motor on lsu.

and comprising a table rotatable relatively the frame below the planes of the cutter chain, gearing for transmitting the power of the motor to drive the cutter chain, a winding drum on the frame, gearing for trans mitting the power of the motor to drive the drum, a cable connected at one end to the drum to be wound lthereon and adapted to be connected at the other end to a point external to the cutter frame, and cable guide pulleys on the frame in planes below the planes of the cutter chain, the pulleys being at points remote from the axis of rotation of the frame whereby the cable tends, when the drum is rotated, to turn the frame and the cutter chain about the said axis.

13. In a coal `cutting machine, the combination with a base, of a coal cutting mechanism extending horizontally from the base to the base, a winding drum on the table, a

cable adapted to'be mounted upon the drum y and to be fastened 'at its other end to a point for rotating the drum, a cable. adapted to be wound upon the drum, and attaching means forthe other end of the cable mounted upon the 4base whereby the winding of the cable on the drum will serve to rotate the -table relatively to the base, substantially as set forth.

15. In a coal cutting machine, the combination of a base, a framework adjustable .vertically and angularly relatively to the base, a coal cutting mechanism extending horizontally from the base and comprising a table-rotatable relatively to the said framework, a rotatable drum mounted upon vthe table, acable adapted to be wound upon the drum, and a plurality 'of 'cable holders mounted upon the adjustable framework to one-of which the end of the cable, may be attached to cause the movement of the table relative to the framework, as the cable is wound upon the drum, substantially as set forth. A

V 16. In a coal cutting machine, the combi nation of a `base frame, supporting track wheels therefor, a cutter apparatus movable asia unit with respect to the base frame about a normally vertical axis 'and comprising a motor and a continuously acting kerf cutting the base frame and held against turning with the cutter apparatus, each adapted for the attaciment of thev cable to cause the cutter appa atus to turn when the cable is wound.

17. In a coal cutting machine, the combination of a wheel-supported truck, a cutter apparatus mounted on and extending forward from the truck and adapted t'o swing horizontally across .the front end thereof while cutting, a power driven reel movable horizontally with the cutting apparatus, a cable connected to the reel, and a plurality of guide sheaves for the cable mounted on the machine and adapted to give the cable fair reel.

.18. In a coal' cutting machine, the combination of a linearly movable base, a cutter frame mounted on the base :tor movement about a `vertical axis, and having an elongated cutter. arm extending horizontally from the base in planes near the top of the frame, an endless cutter chain on the arm, a motor on .the frame below the planes of the cutter arm,gearing for transmitting the power of the motor to drive the cutter chain, a winding drum on the frame, gearing for transmitting the power of the motorV t drive the drum, a cable connected at one end to the drum to be wound thereon and adapted to be connected at the other end to a point external to the machine,

cableV guide pulleys on the frame in planes -below the planes of the cutterarm, the pulleys being at points remote from the axis of rotation of the frame whereby the cable tends, when the drum'is rotated, to turn the frame land the cutter arm about the said axis, and a manually controllable lock for holding the frame and cutter arm against rotation with respect to the base, whereby the cable tends,

when the lock is in operative position and when the drinn is rotated, to linearly move f the machine as a whole.

19.V In a wheel supported coal mining ma chine adapted tobe transported over mine tracks and to cut a horizontal kerf while ysupported on 'a track extending longitudinally toward the face ot the coal, the combination oit a base frame, trackwheels supporting said iframe, cutter apparatus supported by and.

' projecting horizontally from the base frame,

said cutter apparatus being movable laterally in relation to the base iframe while supported thereby to cut a lrerir' extending transversely across the track on which the machine stands, f

devices for driving the cutter apparatus, for moving said apparatus laterally, and for rotating the track wheels to transport the, machine from one working place to another, motor devicescarricd by the base trame for actuating 'the aforesaid devices, and means connected with the machine adapted to aidord a supply'ot motive power to the motor vices when the machine is being transported over a mine track and when it is in oper ation thereon at thev face of the coal.

20. ln a wheel supported coal mining machine adapted lto be transported over mine tracks and to cut a horizontal kerzt while snip ported on a` vtrack extending longitudinally toward the face of the coal, the combination -oit a base frame, track wheels supporting said base frame, cutter apparatus` supported by and projecting horizontally from the base frame, said cutter apparatus being movable laterally in relation to the base rame'ivhile supported thereby to cut a korf extending transversely across the track on which 'the machine stands, devices tor driving the cutter lead in various directions in relation to the- 'mese apparatus, for moving said apparatus laterally in relation to the base frame, and for rotate tromv one working place to another, motor devices for: actuating the aforesaid devices,

Y ing-the track wheels to transport the machine I and means for supplying motive power to v said motor devices comprising a 'flexible con-A ductor for the-power medium,vsaid flexible conductor being connected at one end to the machine and connectibie lat its other end to a source oit power.4

21. In a wheel supported coal mining ma`Y chine adapted tobe transported over mine tracks andto cut a'horizontal kerf while" supported on a track extending longitudinally toward the face of thecoal, the combination ecnV et a base frame, trackwheels supporting saidf A base trarne, cutter apparatus-supported byv and projecting horizontally from said base frame, said cutterapparatus being movable laterally in relation to the base ramewhile supported thereby to cut a -lrerf lextending transversely across the track onfwh'ich themachine stands, devices for drivingv the cutter apparatus, for moving'said apparatus'laterally in relation'to the base frame,and for rotating the traclr wheels to transport the machine from one working place to another,.electric motor devices for actuatingthe 'aforesaid devices, and means for supplying energizing current to said motor 4devices comprisingta reel connected to and movable with the inachine vand a flexible conductor connected at one end to the reel and adapted to have its other end connected to a'source of current supply.

22 In a wheel supported coal mining ina- I' chineadapted to be transported over mine tracks and to cut a horizontal kerf while supported ona track extending longitudinally toward the' face of the coal, the combination` of a base frame, track wheels supporting'said base trame, cutter apparatus. supported by and projecting horizontally from said base frame, said cutter apparatus being movable laterally in relation to the base frame while supported therebyto cut a kerf extendingtransversely across the track on which the machine stands, .means for moving the cutter apparatus laterally as aforesaid, electric motordevices on the machine, and manually y controllable driving connections between the operatively connecting the motor'tb 'either 'the coal cutting mechanism or .the power transmitting element and disconnecting it from the other.'

Q4. In a coal cutting machine, the c ombi nation of a truck comprising axles and wheels connected thereto,.a cutter' frame vvertically adjustable on the truck, a cutter chain on the frame, said cutter frame and chain projecting ',hqrizontally from the truck and being adapt-` edwhen'fed against the coal to cut a horizontally extending kerf, a motor on the frame connected with the cutter chain, a sprocket .wheel on the frame and connected to the motor, a sprocket wheel operatively connected to one of the axles and adapted to. be moved relatively thereto, and a chain adapted to pass over the two sprocket wheels, substantially as set forth.

25. In a "coal cutting machine, the combination of a truck having axles and wheels connected thereto, a cutter frame vertically ad-A -justable on the truck, a cu-tterchain on the frame, said cutter frame and chain projecting horizontally from the truck and being adapted when fed against the coal to cut a horizontally extending kerf, a motor on the frame conneetedwith the cutter chain, a sprocket wheel connected to the motor and bodily movable therewith,a sprocket. wheel operatively connected to one of the axles, a chain adapted to pass over the two sprocket wheels, and `means for moving one of the sprocket wheels with respect to its support to regulate the tension of the chain, substantially as set forth.

26. In a coal cutting machine, the combination of a truck having axles and wheels connected thereto, a cutter frame vertically adjustable on the truck, a cutter chain on the frame, a motor on the frame connected with the cutter chain, a sprocket wheel connected to the 'motor and bodily movable therewith, a bearing bracket adjustably mounted on one of the axles, a jack shaft rotatable in the bearing bracketand parallel to the axle, gearing between the jack shaft and the axle, a sprocket wheel on the jack shaft, a chain adapted to connect the two sprocket wheels, and means for moving the bearing bracket about the axle, substantially as set forth.

27. In a coal cutting machine, the combination of a truck having axles and wheels connected thereto, a cutter frame vertically adjustableron thetruck, a cutter chain on the frame, a motor on the frame connected with the cutter chain, a sprocket wheel connected to the motor and bodily movable therewith,

a bearing bracketrotatable about one of the axles, a jack shaft rotatable on the bearing bracket and parallel to the axle, gearing between the jack shaft and the axle, a sprocket wheel on the jack shaft, a chain adapted to connect the two sprocket wheels, a worm gear segment on the bearing bracket, a worm on Ythe truck adapted t0 enga-ge the worm to change the position ofthe bearing bracket, substantially asset forth. l 28. In a coal cutting machine, thecombination offa vtruck 'having' axles and wheelsv connected thereto, of a vertically adjustable. cutter frame on the truck, acutter chain on the frame, a sprocket wheel on the frame, a motor on the frame, means `for operatively connecting the motor'to eitherthe cutter chainor the sprocket wheel, a sprocket wheel operatively connected to one axle, and a chain adapted to connect the two sprocket wheels, the sprocket wheel connected to the axle being adapted to be moved relative thereto to accommodate itself to the vertical `adjustment of the other sprocket wheel, substantiallyas set forth. Y

29. In a system of coall mining apparatus lcomprising a groundl supported track and a portable mechanism adapted to be transported over and vremain permanently upon and be braced by said track, and also adapted to ported on a section of track extending longitudinally toward said face,'the,combination of a rigid base frame, wheels secured to said base frame and resting upon and braced by said track section, a narrow elongated cutter arm carried by the base frame and movable horizontally and laterally across the front thereof, its forward end extending horizontally to .points outside of'and remote from the vertical boundinglines of the base frame and its rear end extending. back over the base frame, supporting connections between the rear end of the cutter arm and the base frame comprising a horizontally widely extended .rotary brace structure disposed directly above the wheel base of the base frame, a

cutter chain mounted to move in a horizontal path around the periphery of the arm, power `mechanism for drivin@1 the chain, power a horizontal kerf in a coal face while supported on a'seetion of track extending longitudinally toward said face, the combination of a rigid base frame, wheels secured to said base frame and resting upon and braced by said track section, a narrow elongated cutter erm carried by the base frame and movable horizontally and laterally across the cut a horizontal kerf in a coal face while sup- V9o y trontthereohits'forward'end extending horizontally to points outside of and remote troni the vertical bounding lines of the base :trame and itsrear end extending back over the base llframe, supporting connections between the rear end ot the cutter arm and the base trame.

comprising a horizontally widely extended rotary brace structure disposed directly above the wheel base of the base trame, a cutter chain mounted tomove in a horizontal path around the periphery ot 'the arm, motor devices carried by the base frame, and power deviceswhereby the power of said motor devices is caused to drive the cutter chain and -to move the arm laterally from point-s at one side of the track to points at 'thei other side thereof, thereby forming an elongated horizontally extended kerf across the front end of the machine. y

' ed over and remain permanently upon andA berbraced by said track, and4 also adapted 31. In a system of coal mining apparatus comprising a ground supported track` and portable mechanism adapted to be transport- `and remote from the vertical bounding lines ot the base frame and its rear end extending` back overthe base trame, supporting connections between the rear end oit the cutter arm and the base traine comprising a horizontally widely extended rotary brace structure disposed directly above the wheel base of the base frame, a cutter chain mounted to inovein a horizontal path around the periphery of the arm, power mechanism for driving the chain, power mechanism constructedv and arranged to move the armdaterally from points at one side of the track to points at the other side thereof, and motor devices carried by the base frame for actuating the said power mechanisms, the said parts being arranged 'as described whereby an elongated horizontally extended kert may be formed iu the aforesaid elevated planes across the tront ot the machine,

v32. ln a track mounted minino' apparatus' adapted to cuta horizontal kerr extending across its trout from one side ot the track to the other, the combination otra rigid base trame, supporting wheels therefore resting upon and braced'by the track, a laterally movable cutter arm carried by the bast ame and extending therefrom in elevated horizoir tal planes above the other parts of the appa'u ratus, an endless cutter chain movable along the cutter arm in a path horizontal throughout, archain driving motor positioned below the cutter arm and ixedly connected thereto lto move bodily therewith, and power actuated means below the arm for causing it and the cutter chain to move laterally to cut a horizontal kerf in the aforesaid elevated planes extending"transversely from one side, to the other ot the track.

In a track mounted mining apparatus adapted to cut a horizontal kei-t' extending' vices below the said arm for adjusting the arm singularly to-v cause the cutting planes to be inclined or verticallyT in parallelism to move the cutter chain from one set of relatively elevated cutting planes to another set ot more elevated cutting planes, a chain drivin;l motor positioned below the `cutter arm and lixedly connected thereto to move bodily therewith, and power actuated means below the arm for causing it and the chain to move laterally to cut a horizontal or an inclined kert at any of several relatively high elevations and extending transversely from one side ot the track to the other. l

34. In a system of coal mining apparatus comprising a ground supported track and a portable mechanism adapted to be transported over and remain permanently upon and be braced by said track, and also adapted to cut a horizontal kert in a coal tace while supported on a section of track extending longitudinally toward said tace, the combination of a rigid base Jrame, wheels secured to said vbase frame and resting` upon and braced by said track section, a narrow 'elongated cutter arm carried by the base :trame and movable horizontally and laterally across the front thereof, its `forward end extending horizontally to points outside ot and remote from the vert-ical bounding lines ot the base trame and itsrear end extending back over the lbase frame, supporting connections between the rear end of the cutter arm and the base frame comprising a horiaontally Widely extended rotary brace structure disposed directly above the wheel hase of the base trame and means for adjusting the cutter arm'upward and downward, a cutter chain mounted to move in a horizontal path around the periphery ofthe arm, power mechanism tor driving the chain, power mechanism, constructed and arranged to move the` arm laterally from'points at one side ot the track ion to points at the other side thereof, and motor devices carried by the base frame for actuating the said power mechanism, said parts being arranged as described wherebyan elongated horizontallyl extended kerf can be formed .at any one of several elevationsacross the front end of the machine.

' 35.' In a -system of coal mining apparatus comprising a ground 'supported track and a portable mechanismdapted to be transport- .ed over and remain permanentlyupon and be braced by said track, and also adapted'to cut ay horizontal kei-f in a coal face while sup y ported o`n a section of track extendinglongitudinally toward said face, the combination ofa rigid baseframe, wheels secured to said base frame and resting upon and braced by vsaid track section, a narrow elongated cutter arm carried by the base frame and movable horizontally and laterally across the front thereof, its forward end extending horizontally topoints outside of and remote from the vertical bounding lines of the base frame and its rear end extending back over the base frame, supporting connections between the rear end of the cutter arm and the base frame comprising a horizontally widely ex-' tended rotary brace structure disposed dire'ctly above the wheel base of the base frame and means ,for adjusting the cutter arm up n ward and downward, a cutter chain mounted to move in ahorizontal path around-the periphery of the` arm, motor devices carried by the base frame, and power devices'whercby the power of said motor devices is caused to drive the cutter chain and to move the arm laterally from points'at one side of the track to points at the other side thereof, thereby forming an elongated horizontally extended kerf across the front end of the machine at any one of several elevations.

36'. In a track mounted mining apparatus adapted -to cut ahorizontal ke'rf extending across its front from one side of the track to the other, the combination of a rigid base frame, supporting wheels therefor resting upon and braced by the track, a laterally movable cutter arm carried by the base frame and extending horizontally therefrom, an endless cutter chain movable along the cutter arm in a horizontal path.' a'chain driving motor xedly connected to the cutter arm tol move bodily therewith, means for bodily.

adjusting the armvertically in parallelism to Vmove the cutterfcliain' from one set of relatively low cutting planes to another set of relatively high cutting planes, and power actuated means constructed and arranged to cause the arm and the chain to move laterally to cut a horizontal kerf at any .one Vof sev- L feral elevations and extending transversely from one'side to the other of the track.

' 37. Ina system of coal mining 'apparatus -comprising a ground supported track and a portable mechanism adapted toA be transported over and remain permanently upon and be braced by said track, and also adapted to cut a horizontal kerf in a coal face while supported on a section of track extending vlongitudinally toward said face, the Combination of a rigid base frame, wheels secured to -said base frame and resting upon and braced by said track section, a narrow elongated cutter arm carried by the 'base frame and movablehorizontally and laterally across the front thereof, its forward end extending horizontally to points voutside of and remote from the vertical bounding lines of the base frame yand its rear end extending back over the base frame, supporting connections between the rear end of the cutter arm and the Abase frame adapted to permit the arm to swing laterally and comprisinga plurality of up-v right supports upon which the cutter arm is adjustable upward and downward, said supports being arranged at the angles of a. horizontal polygon directly abovethe wheel base of the base frame; a cutter chain mounted to prising af track extending longitudinally toward the coal face and a mining mechanismthereon arranged to cut kerfs which extend across the central longitudinal vertical plane of the track, the combination of a wheeled truck resting on andbraced by the track, three vertically elongated guide supports respectively at the angles ofa triangle in hori zontal plan directly above the truck, a frame Vvertically adjustably connected to each of 'said guide supports independently of the others and forming a relatively widelylex-y tended base directly above the truck, and a horizontal kerf cutter supported at its rear end on said vertically adjustable Aframe and extending forward'to points in front of the truck land adapted to be moved, while cutting, laterally lacross the longitudinal vertical planes nof the truck.

y 39. In a coal 'cutting machine, the coml bin'ation of arigid base frame, three triangularly arranged upright supporting devices xedly mounted on the base frame, a supporting frame mounted on the saididevices and otherwise freely movable as a unit vertically with respect to the base frame, a cutter apparatus' mounted on the supporting frame andswingable horizontally relatively thereto, vthe said apparatus comprising a motor and a continuously acting kerf cut` ting'mechanism driven 'by the motor and extending outward vbeyond the base frame alongnormally horizontal lines, and means adapted in cooperation with the said supporting de'- vices to move the cutter supporting frame and the .cutter apparatus vertically or angularly with respect to the base frame.

40. lin a system of coalmining apparatus comprising a ground supported track and a portable mechanism adapted to be transported over and remain permanently upon and be braced by said traclr, and also adaptedto cut a horizontal lrerf in a coal face while supported on a section of track lextending longitudinally toward said face, the combination of a rigid base trame, wheels secured to said base frame and resting upon and braced by said track section, a narrow elongatedcutter arm carried by the base frame and'movable horizontally and laterallyv across the front thereof,l its forward end extending horizontally to points outside ol' and'remote from the vertical bounding lines oli the base frame and its rear end extending back over the base I frame, supporting connections between the rear end of the cutter arm and -tlie base trame comprising a horizontally widely exf tended rotary brace structure disposed directly above the wheel base of the base frame,

a cutter chain mounted to move in a horizontal path around the periphery oit the arm, power mechanism for driving the chain, power mechanism constructed and arranged to move the arm laterally from points at one side of the tracl to lpoints at the other side thereof, thereby lforming an elongated horizontally extending hert` across the front end of the machine, motor devices carried by" the base frame for actuating the said power mechanisms, and means for angularly adjusting the cutter arm in 'relation to thebase frame to cause the plane ot the kerf to be inclined. Y

41. In a system of coalmining apparatus comprising a ground supported track and a' portable mechanism adapted to be trans-.-

ported lover and remain permanently upon and Abe braced by said track, and also adapted to cut a horizontal hert in a coal face while supported on a`section ot track extending longitudinallytoward said tace, the combination of a rigid base trame, wheels secured to said base trame and resting upon" and ad by said truclr section, a narrow clonl cutter `rami cai by the base frame novable horizont ly and lateral across ont thereof, its forward end entendi y "lorizontally to points outside or' and remate :trom the vertical bounding lines of the base trame and its rear end extending back over the base trame, supporting connections between the rear end of the cutter arm and the base :trame comprising a horizontally widely extendedrotary bracevstructure disosed directly above the wheel base of the liase Jframe, a cutter chain mounted to move in a horizontal path aroundthe periphery of insee the arm, power mechanism for driving the chain, power mechanism constructed and arranged to move the arm laterally from points atone side of the track to points at the other side thereof, thereby forming an elongated horizontally extending across the front end of the machine, motor devices carried by the base frame for actuating the said power mechanism, and means for adjusting the `cutter arm angularly, to cause the plane of the lrerf to be inclined or vertically in parallelism to vary the elevation of the kerf.

42. ln a track mounted mining apparatus adapted to cut a horizontal hert extending across its front from one side of the track to the other, the combination of a rigid base trame, supporting wheelsV .therefor resting upon and braced by the track, a narrow elongated laterally movable cutter arm carried by the base frame and extending horizontally therefrom,'an endless cutter chain movable along the .cutterarm in a path horizontal throughout, 'devices Jfor adjusting the arm angularly to cause the cutting planes to be inclined or vertically in parallelism to move the cutter chain from one set of relatively low cutting planes to another set of relativelyhigh cutting planes, a chain driving motor tixedly connected to the cutter arm to move bodily therewith, and motor actuated means for causing the arm and the chain to move laterally to cnt a horizontal kerli at any of several elevations or inclinations and extending transversely from one side of the track to the other.

43. ln a coal cutting machine, the combination of a wheel supported rigid base frame,

a supporting frame vertically, adjustably mounted on the base frame, a cutter frame on the supporting frame movable with respect to the supporting frame about a normally verticala axis and having a cutter y,arm extending from the base frame along normally horizontal lines above the other parts of the machine, an endless cutter chain mounted on the cutter arm, a motor on the cutter frame, gearing for transmitting the power of the motor to drive the cutter chain, and means for adjusting the supporting frame, together with the cutter ltr-trame, vertically with respect to the base frame or angularly withrespect to the base trame about any one of a plurality of horizontal axes at angles to each other.

'll-fi. ln a coal cutting machine,the combination. ot a movable base trarne,` supporting traclr wheels therefor, a cutter apparatus movable as a unit with respect to the base frame about a normally vertical airis and comprising a motor anda continuously acting lerf cutting mechanism driven by the motor and extending'outward beyond the base frame along normally horizontal lines' near i the uppermost plane of, the machine, the said cutter mechanism being movablel across one end of themachine about the said verft,

cal axis through an arc extending at each side lbeyond the vertical plane of the corresponding trackwheels, means for locking the cutter apparatus to the base frame at any of several angles, and continuously operable devices connected With the said motor for turning the cutter apparatus about the said vertical axis While in operation, or for moving the machine )bodily on its Wheels While the cutting apparatus is in operation, and locked against turning. v

45. `In a Wheel supported coal mining machine adapted to be transported over mine tracks and to cut a horizontal ker While supported on a track extending longitudinally toward the face of the coal, the combination of a'base frame, track wheels supporting said frame, a frame carriedby theA base frame and mounted to turn in relation thereto in normally horizontal planes, continuously acting cutter devices carried by the turning frame and adapted When said frame turns to cut a horizontal kerf extending transversely across the track on Which the machine stands, means for turning the last named frame, a motor 'for actuatingthe turning means, said motor beinV mounted'to move bodily With the turning rame, mechanism for `rotating the track Wheels to transport the machine, and means for operatively connecting the aforesaidl motor to said mechanism When the turning frame is in' a'predetermined position in relation to" the base trarne.

horizontally extending cutter mechanism car-` 46. In a' wheel supported coal mining machine adapted to be transported over mine tracks and to cut a horizontal kerf While sup--v ported-on a track adjacent thel face of the coal, thecombination of a base frame, track Wheels supporting said frame and adapted to maintain. it in alinement With the track, a-

ried by the base frame and mounted tov move from one operative position to another in relation to said frame, a motor connected to drivel the cutter mechanism and mounted to move bodily With said mechanism Whenit is moved as aforesaid, feed mechanism driven by the said motor for moving the cutter mechanism in relation to the base trame during the cutting operation, and a separable trainv of gearing between the motor and the track Wheels adapted to permit the motor to move :bodily and to transmit the power of the motor to rotate the Wheels vvhen the motor is in cutter mechanism, means :tor vertically adf a predetermined position'.

. 47. In a system of coal mining devices of the class described, the combination of a Wheeled truck adapted to run upon andbe laterally braced by a track extending longi` tudinally toward a vertical coal face, cutter mechanism supported 4upon and movable horizontally, While cutting, across the front end of the truck, a motor movable with the justin'gthe motor and the cutting mechanism in horizontal parallelism and adapted to hold it either Where it will form a kerf in relative ly'loW horizontal planes or Where it will Jform -a kerf in other horizontal planes relatively higher than those aforesaid, and power actuated mechanism on the truck for causing the said transverse movement of the cutter mechanism, across the Afront end of the truck While in operation.

48. In a system of coal miningdevices comn prlslng a centrally arranged track and min ing apparatus thereon arranged to cut kerfs Y which extend across the central longitudinal vertical plane of the track, the combination of a Wheeled truck, a series of upright guide columns on the truck respectively situated at the angles of a polygon in a horizontal plan, a cutter frame extending from the central part of said polygon forward horizontally to points in front of the truck, a. cutter chain moving aroundthe said cutter iframe, a chain driving motormovable With the cutter frame,

means connected to the cutter frame and engaging each of the said'columns respectively of a Wheeled truck, a series of vertically elongated guide supports respectively at the angles of a polygon in horizontal plan directly above the truck, a frame connected to each of said guide supports and vertically adjustable thereon .forming a relatively Widely extended base Within said polygon above the truck, and a horizontal kerf cutter supported at its rear end at points on said vertically adjustable trame Within said vpolygon andextendying'forward to points in front of the truck and adapted to be moved, While cutting, transversely across the longitudinal planes of 4 the truck.

50. In a system of coal mining devices co1nprising a centrally arranged track and a mining apparatus thereon arranged to cut kerfs which extend across lthe central longitudinal vertical plane ot the track, the combination of a Wheeled truck, a series of vertically elongated guide supports respectively at the angles of al polygon in ho`r`izontal plan directly above the truck, afframe connected to each of said guide supports and vertically adjustable thereon lforming a relatively Widely. extended base ivithin said polygon above the truck, a

horizontal kerf cutter supported at its rear end at points on said vertically adjustable frame Within said polygon and extending forward to points in front of the truck and adapted to be Amoved, While cutting, transling aparatus thereon 'arranged to cut kerfs which extend across the central longitudinal vertical plane of the track, the combination of a wheeled truck, a series of vertically elon-` gated upwardly extending` columns positioned at the angles of a relatively widelyv extended horizontal polygon above the truck, a frame within the vertical lines of the said polygon adjustably supported on each of the said columns, a" cutter frame connected at points within the polygonfto the vertically adjustable fra-me and extending from points therein to pointspin front of the truck, a motor'carried by the truck, and power transmittingl means wherebv the motor can cause the `Vcutter frame to swingMwhile cutting, transversely across the longitudinal vertical planes of the truck.

52. lin a system of coal mining apparatus comprising a ground supported track and a portable mechanism adapted to be transported over and remain permanently upon and be braced by 4said track, and also adapted to out a'horizontal kerf in a coal face while supported on a section of track extending longitudinally toward said face, the combination of a rigid base frame, wheels secured to said base frame and resting upon and braced by sa1d track section, a narrow elongated cutter arm carried by the base frame and movable horizontally and laterally acrdss the frontI thereof, its forward end extending horizontally to points outside ofl and remote from the vertical bounding lines of the base frame and its rear end extending back over the base frame, supporting connections between the rear end of the cutter arm and the base frame comprising a horizontally widely extended rotary brace structure disposed directly above the `Wheel base of the base frame, a cutter chain mounted to move in a horizontal path around the periphery of the arm, means operable at will for locking the'r cutter arm against lateral movement, power devices for driving'the cutter chain, for moving the-arm laterally from points at one side of the track to points atthe other side thereof, and for moving the cutter arm and chain bodily forward and backward toward and from the coal face when the-arm is locked against lateral nea movement, and motor devices carried by the base frameu for actuating the said power-delig,

`to cut a horizontal kerf in a coal face while extended rotary brace structure disposed directly above the wheel base of the-base frame and means for adjusting the cutter'y arm vertically, a cutter chain mounted horizontal path around the periphery of the arm, means operable at will for locking the cutter arm against 'lateral movement, power devices, operable when the cutter arm is in any position of vertical adjustment, for driving the cutter chain, for moving the arm laterally from points at one side of the track to points at the other side thereof, and for moving the cutter arm and chain bodily forward and backward toward and from the coal face when the arm islocked against lateral movement,Y and motor devices carried by the base frame for actuating the said power devices. y

54. In a system of coal mining devices of the classl described, the combination of a wheeled truck, a cutter frame extending forward Vfrom the truck and adapted to swing across the front end, thereof, a cutter driving motor. supported on the swinging cutter frame, means for adjusting the motor and the cutter frame vertically for the forming of horizontal kerfs in either of several diering horizontal planes, a power driven reel movable horizontally with `the cutter frame, and aV cable connected thereto and adapted to cause the forward movement, bodily, of the cutting apparatus.

55, A mining apparatus comprising a track adaptedto be positioned perpendicular to a vertical wall ina mine, and a mechanism fitted to said track and adapted, first, to be moved forward and backward thereon,` second,.to form horizontal kerfs parallel to the track on 'either side thereof, and?, third, to form a transverse kerf in the wall in front oi the track extending 4from one side of the latter to the other slde, said mechanism comprising a wheeled truck fitted to said track,

cutting means projecting laterally beyond thev fftruck and adapted to form kerfs such as aforesaid, a laterally widely-expanded sup-` to move in a.

porting base-plate carrying lthe cutting means l and positioned above and extending across the wheel-base ofthe truck, and pivotally ,imounted ther-ecm; power operatedrdevices 

